DMM Bitcoin, a Japanese cryptocurrency exchange, has announced its decision to cease operations following a significant security breach in May where approximately $320 million worth of Bitcoin, or 4,500 BTC, was stolen. The company has entered into an agreement with SBI VC Trade, a subsidiary of SBI Digital Holdings, to transfer its customer accounts and assets by March 2025, ensuring that user funds remain secure and are compensated. This incident marks Japan's second-largest cryptocurrency hack, with the Lazarus Group being suspected as the culprit.